Small ease of use convenience APIs. NFC.

Author: gottesmm

lib/SILGen/Initialization.h

@@ -24,10 +24,12 @@
 
 namespace swift {
 namespace Lowering {
-  class SILGenFunction;
 
+class SILGenFunction;
 class Initialization;
 using InitializationPtr = std::unique_ptr<Initialization>;
+class TemporaryInitialization;
+using TemporaryInitializationPtr = std::unique_ptr<TemporaryInitialization>;
 
 /// An abstract class for consuming a value.  This is used for initializing
 /// variables, although that is not the only way it is used.

lib/SILGen/ManagedValue.h

@@ -372,6 +372,12 @@ class ConsumableManagedValue {
   ConsumableManagedValue asBorrowedOperand() const {
     return { asUnmanagedValue(), CastConsumptionKind::CopyOnSuccess };
   }
+
+  /// Return a managed value that's appropriate for copying this value and
+  /// always consuming it.
+  ConsumableManagedValue copy(SILGenFunction &SGF, SILLocation loc) const {
+    return ConsumableManagedValue::forOwned(asUnmanagedValue().copy(SGF, loc));
+  }
 };
 
 } // namespace Lowering